Oven.



11. 1. HBLMAN.

OVEN.

APPLICATION FILED rmm, 1911'.

Patented Jan. 9, 1912.

2 SHEETS-SHEET 1 R. P. HEL-MAN.

OVEN.

APPLICATION FILED 12mm, 1911.

1,014,149. y Patented Jan.9,1912

2 SHEETS-SHEET 2.

[Mfr/e556;

RALPH I. HELMAN, OF LOS ANGELES, CALIFORNIA.

OVEN.

Specification of Letters Patent.

Application filed February 7, 1911. Serial No. 607,078.

To all whom it may concern:

Be it known that I, RALPH P. HELMAN, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, having invented new and useful Improvements in Ovens, ofwhich the following is a specification.

This invention relates to ovens, and more particularly to ovens forheating and cooking and allied domestic purposes; and it has for itsobject to provide improvements in ovens which will be superior in pointof relative simplicity and inexpensiveness of construction, economy inthe use of heat units, speed and thoroughness in operation, and facilityin use and handling, storage and shipment, and which will be generallysuperior in efiiciency and serviceability.

With the above and other objects in View, the invention consists in thenovel provision, construction, formation, combination, association andrelative arrangement of parts, members and features, all as hereinafterdescribed, shown in the drawings and finally pointed out in claims.

In the drawings: Figure 1 is a perspective View of an oven constructedand organized in accordance with the invention, the same being brokenaway in part for clearness of illustration; Fig. 2 is a detailfragmentary view of a lining member of the oven; Fig. 3 is a fragmentaryhorizontal sectional view taken adjacent to the lower portion of theoven; Fig. 4 is a vertical transverse sectional view taken adjacent tothe rearward portion of the oven; Fig. 5 is a vertical sectional viewtaken at right angles to the showing in .Fig. 4; and, Fig. 6 is a detailfragmentary view illustrating the means of detachable connection ofparts of the oven structure.

Corresponding parts in all the figures are denoted by the same referencecharacters.

Referring with particularity to the drawings, the oven comprises in themain rectangular body members including a rear member 7, a front member8, opposite side members 9 and 10, a top member 11, and a bottom member12. The front member 8 is provided with a rectangular opening to provideaccess to the'interior of the oven, said opening being adapted to beclosed by a swinging door 13 having a locking knob or thumb piece 14 forholding the same in closed. position. The bottom member -12 is providedwith a .transverse relatively narrow burner opening 15 extendingsubstantially between the side members 9 and 10, and ,a suitable gas orother burner 16 is disposed directly beneath the same, a flue casing Bbeing disposed directly above the same and resting uponthe bottom member12. The flue casing B is open at top and bottom andis builtup of a frontmember 17, a rear member 18, 'and opposed side members 19 and 20extending between the front and rear members. The flue casing .B tapersupwardly with respect to the side members 19 and 20 which are insynclinal relation, the rear member 18 is slightly spaced from the rearmember 7 of the oven frame, and the forward member 17 of the flue casingis inclined rearwardly and upwardly, all as clearly shown in thedrawings, producing a general upward tapering of the entire flue casingwhich is conducive to the production of strong flue action. Within thewalls or upright members of the oven frame organized as above, aredisposed upright lining members, 21, 22 and 23, each slightly spacedfrom the respective body members 7, 9 andlO, and resting upon the bottommember 12; asbestos or similar heatinsulating sheets 24 being disposedin the pockets or spaces so formed and facially out of contact with theinclosing surfaces. Upon the inner surfaces of the lining members 22 and23 are located horizontal cleats 25, in pairs the members of which areopposed; and upon 'the respective pairs of cleats are mounted shelves26, 27 and 28,

in downward enumeration, the same being horizontally disposed andextending between the opening closed by the door 13 and the forwardmember. or wall-17 of the flue casing B. i

The upper shelf 26 is foraminous or of open formation, so as to freelypermit the passage of heat waves or currents through the same, whereasthe shelves 27 and 28 are of unbrokenformation, the shelf 27 beingslightly spaced from the opening in the oven member .8, which is. closedby the door 13, and the lower shelf 28 being slightly spaced from theforward member 17 of the flue casing B.

The forward wall 17 of the flue casing B is provided with a plurality ofvents 29 which are adapted to register with corresponding vents 30 in aslidable damper Patented Jan. 9, 1912.

plate 31 applied to the outer face of the member 17, and provided with afinger piece 32 for the manipulation thereof.

At one side, as 9, of the oven frame, is disposed an upright boiler orwater container 33 with which communicates a heating'coil or pipe 34which is disposed directly above the bottom member 12 of the oven frame,at both sides of the burner opening 15.

, The burner 16 is provided with a supply pipe 16 leading to anysuitable fuel supply.

The door 13 is provided with double walls forming an internal fluechamber 13 terminating at the upper portion of the door in vents 13",the rearward portion of the door being provided with an elongatedtransverse vent 13 above which is disposed a horizontal downwardly andinwardly inclined deflector 13 The various oven frame members 7, 8, 9,10, 11 and 12, as well as the members 17, 18, 19 and 20 of the fluecasing B, are detachably connected, so as to be readily reduced gtoknocked-down condition, by a species of lap joint, C, shown in detail inFig. 6, and formed by producing a U-shaped joint member 35 upon one ofthe members to be joined, and a hook-shaped joint member 36 upon theother member to be joined, said joint members being coengaged andcompressed into compact relation and then positively united and held indetachable condition by a suflicient number of stove bolts, or the like,

37. This form of joint 0 is carried into use throughout the entireorganization of the oven frame and the frame of the flue casing B, withrelation to the members and parts thereof above recited, and is clearlyshown in the drawings. By withdrawing the bolts 37, the joints 0 may beopened and the parts and members relatively separated so that the sixframe members of the oven, that is the four sides and top and bottom,and the four frame members of the flue casing, may all be taken apart ordetached each from the others, and the entire oven as described reducedtoknocked-down condition, inclusive of the lining members 21,- 22

and 23 and the shelves 26, 27 and 28, the

boiler or water container 33 being of course detached from its heatingpipe 34. The heat insulating strips 24 may also be compactly disposedwith the other; parts and ,;members when the oven is in knocked-downcondition. The lining members 21, 22 and 23 are provided at the top andbottom with laterally directed flanges 38, as indicated in Fig. 2, whichrespectively bear against the rear member 7 and the side member 9 andthe side member 10 of the oven frame, keeping the lining members spacedfrom said oven frame members, and producing dead air spaces within whichthe heat insulating sheets 24 are disposed. These flanges and liningmembers are not, however, concerned in the invention.

A number of vents 39 may be formed in the side and rear oven framemembers to introduce air beneath the bottom member for supportingcombustion at the burner 16. These may extend through the flanges on thebottom member 12.

The operation, method of use and advantages of the improvements in ovensconstituting the invention will be readily understood from the foregoingdescription, taken in connection with the accompanying drawings and thefollowing statement: It has been pointed out in what manner the entirestructure may be reduced from operative form and organization tocollapsed or knocked-down condition, and this will be manifest from whathas gone before. Likewise, it .Wlll be manifest that the heatingcurrents or currents of heat units produced at the'burner 16 willtraverse the flue casing B upwardly, pass through the open formation ofthe upper shelf 26, pass forwardly of the intermediate shelf 27, passrearwardly of the bottom shelf 28, and thence enter the hollow door 13and be discharged upwardly through the flue 13 therein and outwardly atthe vents l3 at the top thereof. The heating currents will thus traversea to and fro course within the interior of the oven, passing intointimate contact with and directly affecting articles or utensils placedwithin the oven upon the shelves and upon the bottom member of the oven.The upwardly tapering form of the flue casing B enhances the movementsof the heating currents, and incidentallythe heat produced at the burnergives a supply of hot Water in the container 33 by means of the heatingcoil or pipe 34.

The dead air spaces between the lining members and the frame members ofthe oven, together with the insulating sheets 24, obviate almostentirely any losses of heat units by radiation, and the efliciency ofthe oven as a whole, with relation to economy in fuel consumption andcomplete utilization of heat units, is high.

It is manifest that by a particular and peculiar formation, combinationand detachable connection of parts, together with arrangement thereof, Iam able to provide an oven which is of high economy and efliciency inservice and at the same time may readily ciation, and relativearrangement of parts, 7

members and features shown and described; but reserve the right to varythe same, in adapting the improvements to varying con ditions of use,without departing from the spirit of the invention or the terms of thefollowing claims:

Having thus described my invention, I claim and desire to secure byLetters Patent:

1. An oven provided with an interiorly located flue opening into theoven; in combination with means for causing heat units to traverse anirregular course within the oven; said last named means comprisingspaced shelves one of which contacts with the flue and the other ofwhich .is spaced from the flue.

2. An oven provided with a flue disposed interiorly thereof and openinginto the oven, and with a door having an interior flue communicatingwith the interior of the oven, in combination with means for causingheat units to traverse an irregular course within the oven to and frobetween the flues.

3. An oven provided with an interiorly disposed flue opening into theoven and with a door spaced therefrom, the door being provided with aflue chamber communicating with the interior of the oven, spaced shelveswithin the oven one of which contacts with the flue and the other ofwhich is spaced from the flue.

4:. An oven provided with a bottom member having a transverse burneropening, a burner applied at the burner opening, an upright flue withinthe oven above the burner opening and opening into the oven, an ovendoor spaced from the flue and having a flue chamber communicating withthe interior of the oven, there being vents for the flue chamber of thedoor at the upper and lower portions thereof, and a deflector upon thedoor above the vent at the lower portion of the flue chamber.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

' RALPH P. HELMAN.

Witnesses:

RAYMOND W. BLAKnsLnn, E. G. MoisKns.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

